Road grader and leveler



(No Moder.)

J. SKINNER. ROAD GRADER AND LEVELEB.

UNITED STATES PATENT OFFICE.

JOHN SKINNER, OF 7 NE\VMAN, ILLINOIS.

ROAD GRADER AND LEVELER..

SPECIFICATION forming part of Letters Patent No. 364,445, dated June '7, 1887.

Application filed March 20, 1886.

To aZZ whom it may concern.-

Be it known that I, JOHN SKINNER, of Newman, in the county of Douglas and State of Illinois, have invented a new and useful Improvement in the Road Grader and Leveler for which I received Letters Patent No. 324,178, dated August 11, 1885, and the following is a specification of my improvement of said ma; chine.

The object of my invention is to facilitate and improve the method of elevating and low ering the framework carrying the harrowteeth and scraper of my road grader and leveler.

In the accompanying drawings, in wlfich similarletters of reference indicate like parts, Figure 1 is a perspective view of the entire machine adjusted as required when in actual operation. Fig. 2 is aperspective detail view.

A A A A are parallel beams, in which harrow-tecth are fixed.

B B is a strong board in the rear of and parallel with the harrow beams A A A A and connected with harrowbcams by arched crossbea'msD D D.

C G is a curved steel plate attached to the I front of the board 'B B, and forming the scraper and mold-board.-

As a means for raising the scraper B 0 off the ground or holding it fixed in any adjustment relative to the surface it works on, I employ elbow -levers E, which are pivoted at their angles and carry wheels 0 in the slotted ends of their lower and shorter arms. The said levers are pivoted to toothed segments K, which are hinged vertically to suitable brackets, 7c, bolted to the rear side of scraper-board B, so that they will enable the partsE O to turn laterally according to the direction of motion of the machine. Sliding spring-actuated pawls L are applied to the levers E on their upper sides, and adapted to engage with the teeth of segments K, so as to lock said levers in any desired adjustment. The means for elevating the front portion of the machineto wit, the toothed bars A A-are the wheel X and a systemof levers and rods arranged in the middle of the machine. The standard of wheel X is swiveled in the shorter arm of the elbow-lever Y, and hence operates as a caster when in contact with the ground. The longer arm of said lever Y extends hack and is pivoted to the central cross-beam, D.

A slotted lever, J, is pivoted at I to the center cross beam, D, through the slot of The chains fastened to the frontharrow-beam near its ends are simply draft-chains, to which the motive power is attached.

When it is desired to elevate the road grader and leveler, in order to pass over bridges, culverts, streetcrossings, or any other obstacle, or when it is desired to transport the machine without operating it, the harrow teeth and scraper may be lifted from the ground by moving the levers E E and J backward and downward, and permitting the spring-pawls L L L to engagethe toothed segments KKK. These place the wheels 0 O and X. in contact with the ground, so as to elevate the machine to any desired height and support the same.

To lower the machine,press the spring-pawls L L L, so as to disengage the toothed segments, and raise the ends of the levers E E and J as far as desired, and then permit the springpawls to engage the toothed segments. The wheels may be raised clear of the ground, if desired, by simply pressing the levers sufficient] y upward and forward while the toothed segments are disengaged.

I claim as my invention-- 1. The combination, with the road grader and scraper, of toothed segments K, hinged, as specified, so as toswing laterally, the el bow-levers having wheels attached, and locking-pawls arranged to engage said segments, as shown and described.

2. The combination, with the road scraper and grader, of the system of levers Y J and arms connecting them, the wheel X, the locking-pawl, and a toothed segment attached to the frame of the machine, as shown and deing devices consisting ofa wheel and the sysscribed. tem of connected levers Y J, all arranged subto 3. The combination,with the parallel toothed stantially as set forth. bars A, the scraper O, and the cross-bars D, s 5 to which said parts are rigidly attached, of JOHN SKINN the rear adjusting devicesto wit, the toothed Witnesses: segments, pivoted levers, pawls, and wheels 0. V. WVALLs, attached to said scraperand the front adj ust- R. \V. SUTTON 

